En 200 gramos de NaCl en que porcentaje se encuentra el Na
a) 17.75% c) 35,5%
b) 5.5 % d) 11.5%

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

How does the viscosity of magma change as magma cools?

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.